3 * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 * Designware ethernet IP driver for u-boot
31 #include <linux/err.h>
33 #include "designware.h"
35 static void tx_descs_init(struct eth_device *dev)
37 struct dw_eth_dev *priv = dev->priv;
38 struct eth_dma_regs *dma_p = priv->dma_regs_p;
39 struct dmamacdescr *desc_table_p = &priv->tx_mac_descrtable[0];
40 char *txbuffs = &priv->txbuffs[0];
41 struct dmamacdescr *desc_p;
44 for (idx = 0; idx < CONFIG_TX_DESCR_NUM; idx++) {
45 desc_p = &desc_table_p[idx];
46 desc_p->dmamac_addr = &txbuffs[idx * CONFIG_ETH_BUFSIZE];
47 desc_p->dmamac_next = &desc_table_p[idx + 1];
49 #if defined(CONFIG_DW_ALTDESCRIPTOR)
50 desc_p->txrx_status &= ~(DESC_TXSTS_TXINT | DESC_TXSTS_TXLAST |
51 DESC_TXSTS_TXFIRST | DESC_TXSTS_TXCRCDIS | \
52 DESC_TXSTS_TXCHECKINSCTRL | \
53 DESC_TXSTS_TXRINGEND | DESC_TXSTS_TXPADDIS);
55 desc_p->txrx_status |= DESC_TXSTS_TXCHAIN;
56 desc_p->dmamac_cntl = 0;
57 desc_p->txrx_status &= ~(DESC_TXSTS_MSK | DESC_TXSTS_OWNBYDMA);
59 desc_p->dmamac_cntl = DESC_TXCTRL_TXCHAIN;
60 desc_p->txrx_status = 0;
64 /* Correcting the last pointer of the chain */
65 desc_p->dmamac_next = &desc_table_p[0];
67 writel((ulong)&desc_table_p[0], &dma_p->txdesclistaddr);
70 static void rx_descs_init(struct eth_device *dev)
72 struct dw_eth_dev *priv = dev->priv;
73 struct eth_dma_regs *dma_p = priv->dma_regs_p;
74 struct dmamacdescr *desc_table_p = &priv->rx_mac_descrtable[0];
75 char *rxbuffs = &priv->rxbuffs[0];
76 struct dmamacdescr *desc_p;
79 for (idx = 0; idx < CONFIG_RX_DESCR_NUM; idx++) {
80 desc_p = &desc_table_p[idx];
81 desc_p->dmamac_addr = &rxbuffs[idx * CONFIG_ETH_BUFSIZE];
82 desc_p->dmamac_next = &desc_table_p[idx + 1];
85 (MAC_MAX_FRAME_SZ & DESC_RXCTRL_SIZE1MASK) | \
88 desc_p->txrx_status = DESC_RXSTS_OWNBYDMA;
91 /* Correcting the last pointer of the chain */
92 desc_p->dmamac_next = &desc_table_p[0];
94 writel((ulong)&desc_table_p[0], &dma_p->rxdesclistaddr);
97 static void descs_init(struct eth_device *dev)
103 static int mac_reset(struct eth_device *dev)
105 struct dw_eth_dev *priv = dev->priv;
106 struct eth_mac_regs *mac_p = priv->mac_regs_p;
107 struct eth_dma_regs *dma_p = priv->dma_regs_p;
109 int timeout = CONFIG_MACRESET_TIMEOUT;
111 writel(DMAMAC_SRST, &dma_p->busmode);
112 writel(MII_PORTSELECT, &mac_p->conf);
115 if (!(readl(&dma_p->busmode) & DMAMAC_SRST))
123 static int dw_write_hwaddr(struct eth_device *dev)
125 struct dw_eth_dev *priv = dev->priv;
126 struct eth_mac_regs *mac_p = priv->mac_regs_p;
127 u32 macid_lo, macid_hi;
128 u8 *mac_id = &dev->enetaddr[0];
130 macid_lo = mac_id[0] + (mac_id[1] << 8) + \
131 (mac_id[2] << 16) + (mac_id[3] << 24);
132 macid_hi = mac_id[4] + (mac_id[5] << 8);
134 writel(macid_hi, &mac_p->macaddr0hi);
135 writel(macid_lo, &mac_p->macaddr0lo);
140 static int dw_eth_init(struct eth_device *dev, bd_t *bis)
142 struct dw_eth_dev *priv = dev->priv;
143 struct eth_mac_regs *mac_p = priv->mac_regs_p;
144 struct eth_dma_regs *dma_p = priv->dma_regs_p;
147 /* Reset ethernet hardware */
148 if (mac_reset(dev) < 0)
151 writel(FIXEDBURST | PRIORXTX_41 | BURST_16,
154 writel(FLUSHTXFIFO | readl(&dma_p->opmode), &dma_p->opmode);
155 writel(STOREFORWARD | TXSECONDFRAME, &dma_p->opmode);
157 conf = FRAMEBURSTENABLE | DISABLERXOWN;
159 if (priv->speed != SPEED_1000M)
160 conf |= MII_PORTSELECT;
162 if (priv->duplex == FULL_DUPLEX)
163 conf |= FULLDPLXMODE;
165 writel(conf, &mac_p->conf);
170 * Start/Enable xfer at dma as well as mac level
172 writel(readl(&dma_p->opmode) | RXSTART, &dma_p->opmode);
173 writel(readl(&dma_p->opmode) | TXSTART, &dma_p->opmode);
175 writel(readl(&mac_p->conf) | RXENABLE, &mac_p->conf);
176 writel(readl(&mac_p->conf) | TXENABLE, &mac_p->conf);
181 static int dw_eth_send(struct eth_device *dev, volatile void *packet,
184 struct dw_eth_dev *priv = dev->priv;
185 struct eth_dma_regs *dma_p = priv->dma_regs_p;
186 u32 desc_num = priv->tx_currdescnum;
187 struct dmamacdescr *desc_p = &priv->tx_mac_descrtable[desc_num];
189 /* Check if the descriptor is owned by CPU */
190 if (desc_p->txrx_status & DESC_TXSTS_OWNBYDMA) {
191 printf("CPU not owner of tx frame\n");
195 memcpy((void *)desc_p->dmamac_addr, (void *)packet, length);
197 #if defined(CONFIG_DW_ALTDESCRIPTOR)
198 desc_p->txrx_status |= DESC_TXSTS_TXFIRST | DESC_TXSTS_TXLAST;
199 desc_p->dmamac_cntl |= (length << DESC_TXCTRL_SIZE1SHFT) & \
200 DESC_TXCTRL_SIZE1MASK;
202 desc_p->txrx_status &= ~(DESC_TXSTS_MSK);
203 desc_p->txrx_status |= DESC_TXSTS_OWNBYDMA;
205 desc_p->dmamac_cntl |= ((length << DESC_TXCTRL_SIZE1SHFT) & \
206 DESC_TXCTRL_SIZE1MASK) | DESC_TXCTRL_TXLAST | \
209 desc_p->txrx_status = DESC_TXSTS_OWNBYDMA;
212 /* Test the wrap-around condition. */
213 if (++desc_num >= CONFIG_TX_DESCR_NUM)
216 priv->tx_currdescnum = desc_num;
218 /* Start the transmission */
219 writel(POLL_DATA, &dma_p->txpolldemand);
224 static int dw_eth_recv(struct eth_device *dev)
226 struct dw_eth_dev *priv = dev->priv;
227 u32 desc_num = priv->rx_currdescnum;
228 struct dmamacdescr *desc_p = &priv->rx_mac_descrtable[desc_num];
230 u32 status = desc_p->txrx_status;
233 /* Check if the owner is the CPU */
234 if (!(status & DESC_RXSTS_OWNBYDMA)) {
236 length = (status & DESC_RXSTS_FRMLENMSK) >> \
237 DESC_RXSTS_FRMLENSHFT;
239 NetReceive(desc_p->dmamac_addr, length);
242 * Make the current descriptor valid again and go to
245 desc_p->txrx_status |= DESC_RXSTS_OWNBYDMA;
247 /* Test the wrap-around condition. */
248 if (++desc_num >= CONFIG_RX_DESCR_NUM)
252 priv->rx_currdescnum = desc_num;
257 static void dw_eth_halt(struct eth_device *dev)
259 struct dw_eth_dev *priv = dev->priv;
262 priv->tx_currdescnum = priv->rx_currdescnum = 0;
265 static int eth_mdio_read(struct eth_device *dev, u8 addr, u8 reg, u16 *val)
267 struct dw_eth_dev *priv = dev->priv;
268 struct eth_mac_regs *mac_p = priv->mac_regs_p;
270 int timeout = CONFIG_MDIO_TIMEOUT;
272 miiaddr = ((addr << MIIADDRSHIFT) & MII_ADDRMSK) | \
273 ((reg << MIIREGSHIFT) & MII_REGMSK);
275 writel(miiaddr | MII_CLKRANGE_150_250M | MII_BUSY, &mac_p->miiaddr);
278 if (!(readl(&mac_p->miiaddr) & MII_BUSY)) {
279 *val = readl(&mac_p->miidata);
288 static int eth_mdio_write(struct eth_device *dev, u8 addr, u8 reg, u16 val)
290 struct dw_eth_dev *priv = dev->priv;
291 struct eth_mac_regs *mac_p = priv->mac_regs_p;
293 int ret = -1, timeout = CONFIG_MDIO_TIMEOUT;
296 writel(val, &mac_p->miidata);
297 miiaddr = ((addr << MIIADDRSHIFT) & MII_ADDRMSK) | \
298 ((reg << MIIREGSHIFT) & MII_REGMSK) | MII_WRITE;
300 writel(miiaddr | MII_CLKRANGE_150_250M | MII_BUSY, &mac_p->miiaddr);
303 if (!(readl(&mac_p->miiaddr) & MII_BUSY))
308 /* Needed as a fix for ST-Phy */
309 eth_mdio_read(dev, addr, reg, &value);
314 #if defined(CONFIG_DW_SEARCH_PHY)
315 static int find_phy(struct eth_device *dev)
321 eth_mdio_read(dev, phy_addr, MII_BMCR, &ctrl);
322 oldctrl = ctrl & BMCR_ANENABLE;
324 ctrl ^= BMCR_ANENABLE;
325 eth_mdio_write(dev, phy_addr, MII_BMCR, ctrl);
326 eth_mdio_read(dev, phy_addr, MII_BMCR, &ctrl);
327 ctrl &= BMCR_ANENABLE;
329 if (ctrl == oldctrl) {
332 ctrl ^= BMCR_ANENABLE;
333 eth_mdio_write(dev, phy_addr, MII_BMCR, ctrl);
337 } while (phy_addr < 32);
343 static int dw_reset_phy(struct eth_device *dev)
345 struct dw_eth_dev *priv = dev->priv;
347 int timeout = CONFIG_PHYRESET_TIMEOUT;
348 u32 phy_addr = priv->address;
350 eth_mdio_write(dev, phy_addr, MII_BMCR, BMCR_RESET);
352 eth_mdio_read(dev, phy_addr, MII_BMCR, &ctrl);
353 if (!(ctrl & BMCR_RESET))
361 #ifdef CONFIG_PHY_RESET_DELAY
362 udelay(CONFIG_PHY_RESET_DELAY);
367 static int configure_phy(struct eth_device *dev)
369 struct dw_eth_dev *priv = dev->priv;
372 #if defined(CONFIG_DW_AUTONEG)
378 #if defined(CONFIG_DW_SEARCH_PHY)
379 phy_addr = find_phy(dev);
381 priv->address = phy_addr;
385 if (dw_reset_phy(dev) < 0)
388 #if defined(CONFIG_DW_AUTONEG)
389 bmcr = BMCR_ANENABLE | BMCR_ANRESTART | BMCR_SPEED100 | \
390 BMCR_FULLDPLX | BMCR_SPEED1000;
392 bmcr = BMCR_SPEED100 | BMCR_FULLDPLX;
394 #if defined(CONFIG_DW_SPEED10M)
395 bmcr &= ~BMCR_SPEED100;
397 #if defined(CONFIG_DW_DUPLEXHALF)
398 bmcr &= ~BMCR_FULLDPLX;
401 if (eth_mdio_write(dev, phy_addr, MII_BMCR, bmcr) < 0)
404 /* Read the phy status register and populate priv structure */
405 #if defined(CONFIG_DW_AUTONEG)
406 timeout = CONFIG_AUTONEG_TIMEOUT;
408 eth_mdio_read(dev, phy_addr, MII_BMSR, &bmsr);
409 if (bmsr & BMSR_ANEGCOMPLETE)
414 eth_mdio_read(dev, phy_addr, MII_LPA, &anlpar);
415 eth_mdio_read(dev, phy_addr, MII_STAT1000, &btsr);
417 if (btsr & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
418 priv->speed = SPEED_1000M;
419 if (btsr & PHY_1000BTSR_1000FD)
420 priv->duplex = FULL_DUPLEX;
422 priv->duplex = HALF_DUPLEX;
424 if (anlpar & LPA_100)
425 priv->speed = SPEED_100M;
427 priv->speed = SPEED_10M;
429 if (anlpar & (LPA_10FULL | LPA_100FULL))
430 priv->duplex = FULL_DUPLEX;
432 priv->duplex = HALF_DUPLEX;
435 if (eth_mdio_read(dev, phy_addr, MII_BMCR, &ctrl) < 0)
438 if (ctrl & BMCR_FULLDPLX)
439 priv->duplex = FULL_DUPLEX;
441 priv->duplex = HALF_DUPLEX;
443 if (ctrl & BMCR_SPEED1000)
444 priv->speed = SPEED_1000M;
445 else if (ctrl & BMCR_SPEED100)
446 priv->speed = SPEED_100M;
448 priv->speed = SPEED_10M;
453 #if defined(CONFIG_MII)
454 static int dw_mii_read(const char *devname, u8 addr, u8 reg, u16 *val)
456 struct eth_device *dev;
458 dev = eth_get_dev_by_name(devname);
460 eth_mdio_read(dev, addr, reg, val);
465 static int dw_mii_write(const char *devname, u8 addr, u8 reg, u16 val)
467 struct eth_device *dev;
469 dev = eth_get_dev_by_name(devname);
471 eth_mdio_write(dev, addr, reg, val);
477 int designware_initialize(u32 id, ulong base_addr, u32 phy_addr)
479 struct eth_device *dev;
480 struct dw_eth_dev *priv;
482 dev = (struct eth_device *) malloc(sizeof(struct eth_device));
487 * Since the priv structure contains the descriptors which need a strict
488 * buswidth alignment, memalign is used to allocate memory
490 priv = (struct dw_eth_dev *) memalign(16, sizeof(struct dw_eth_dev));
496 memset(dev, 0, sizeof(struct eth_device));
497 memset(priv, 0, sizeof(struct dw_eth_dev));
499 sprintf(dev->name, "mii%d", id);
500 dev->iobase = (int)base_addr;
503 eth_getenv_enetaddr_by_index(id, &dev->enetaddr[0]);
506 priv->mac_regs_p = (struct eth_mac_regs *)base_addr;
507 priv->dma_regs_p = (struct eth_dma_regs *)(base_addr +
509 priv->address = phy_addr;
511 if (mac_reset(dev) < 0)
514 if (configure_phy(dev) < 0) {
515 printf("Phy could not be configured\n");
519 dev->init = dw_eth_init;
520 dev->send = dw_eth_send;
521 dev->recv = dw_eth_recv;
522 dev->halt = dw_eth_halt;
523 dev->write_hwaddr = dw_write_hwaddr;
527 #if defined(CONFIG_MII)
528 miiphy_register(dev->name, dw_mii_read, dw_mii_write);